allow signed migration (#2803)

runtime/karura/src/lib.rs

@@ -1837,6 +1837,10 @@ impl orml_parameters::Config for Runtime {
 	type WeightInfo = ();
 }
 
+frame_support::ord_parameter_types! {
+	pub const MigController: AccountId = AccountId::from(hex_literal::hex!("ec68c9ec1f6233f3d8169e06e2c94df703c45c05eef923169bf2703b08797315"));
+}
+
 parameter_types! {
 	// The deposit configuration for the singed migration. Specially if you want to allow any signed account to do the migration (see `SignedFilter`, these deposits should be high)
 	pub MigrationSignedDepositPerItem: Balance = dollar(KAR);
@@ -1848,7 +1852,7 @@ impl pallet_state_trie_migration::Config for Runtime {
 	// An origin that can control the whole pallet: should be Root, or a part of your council.
 	type ControlOrigin = EnsureRootOrTwoThirdsTechnicalCommittee;
 	// specific account for the migration, can trigger the signed migrations.
-	type SignedFilter = frame_support::traits::NeverEnsureOrigin<AccountId>;
+	type SignedFilter = frame_system::EnsureSignedBy<MigController, AccountId>;
 	type RuntimeEvent = RuntimeEvent;
 	type Currency = Balances;
 	type RuntimeHoldReason = RuntimeHoldReason;